Grinding-machine.



S. NIKULGFF. GBINDING MACHINE. Anymcmo: FILED Nov. 21, 1904.

2 SHEBTS-SHEET l.

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atente Sept.4 l5, i908* l s. NIKULOPF. @BINDING MAHINB. APPLICATION FILED Nov. 21, 1904.

2 SHEETS-SHEET SUBBO NIKOLOFF, OF WORCESTER, MASSACHUSETTS.

GRNDING-MACHINE.

Specification of Letters Patent.

` Patented Sept. 15, 1908.

Application ledfNovember 21, 1904. v Serial No. 233,605.

T o all whom it may concern:

Be it known that I, SUBBo NIxoLoFF, a citizen., of theUnited States, residing at Worcester, in the county of Worcester and ACommonwealth of Massachusetts, have invented anew and useful` Improvement in Grinding-Machines, of which the following is a specification, accompanied by drawings forming a part ofthe same, in which- Figurel represents a front View of a grind'` ing machine embodying my invention. Fig. 2 is a side elevation artly shown in section.

Similar reference etters and figures refer to similar parts inthe different views.

My present invention relates to that part of a grmding machine which is concerned inA the sup ort and adjustment of the grinding wheel s aft, and it consists in the construction and arrangement of partses hereinafter described and pointed out in the annexed claims.

Referring to the accompanyin drawings, 1 denotes a su porting ost or xifiyramework, 2 .a table or beg upon w 'ch the work to be ground may be su ported, or if desired, the work may be held etween centers 3, 3.

4, 4, denote grinding wheels' carried upon a rotating shaft 5 journaled in bearings 6, 6, carried by the lower-end of an adjustable sleeve 7. The sleeve 7 is journaled in a bearing 8 with its axis at right angles to the axis of the grinding wheel shaft 5. Attached to the up er end of the sleeve 7 is a worm gear whee 9 enga ed by a worm 10 provided with a hand whee 11 by which the worm 10 is rotated in order to relatively adjust the sleeve 7 in the bearing 8.

The bearing 8 is cut apart on one side and its two halves are clamped together by a clamping screw 12 in order to pinch the' sleeve 7 and hold it in its adjusted position. The bearing 8 is formed upon the outer end of a curved arm or gooseneck 13 carried on ,the upper end of a vertical sliding spindle 14 having a sliding movement in a hollow ost 15 by means of an actuating screw 16 w ich is rotated by miter gears 17, horizontal shaft 18 and hand wheel 19, in order to raise and lower the spindle 14 in the hollow post 15. The spindleI 14 is held from rotating by means of a key 2() held in the post 15 and v sliding in a keyway or slot 21 in the spindle 14. Attached to the base of the gooseneck 13 is a sleeve 22 which extends downwardly over the hollow post 15 in order to prevent the admission of dirt to the bearing portions Y of the spindle 14. Mounted upon they top of the gooseneck 13 is a plate 23 which extends over the bearing 8 and is provided with a downwardly projecting flange 24 to inclose the worm gear wheel 9. The late 23 has a central opening 25 to admit a i riving belt 26 which is conducted from an overhead driving shaft, not shown, to a belt pulley 27 attached to the grinding wheel shaft 5. The vertical adjustment of the grinding wheels is accomplished by means of a hand wheel 19 and screw 16 engaging a nut 28 held in the lower end of the spindle 14. By means of the worm gear wheel 9 and worm 10, rotated by the hand wheel 11, the adjustable sleeve 7 may be rotated within the bearing 8 by loosening the clamping screw 12 in order to vary the axis of the grinding wheel shaft 5 rolatively to the axis of the work hold on tho centers 3, 3', and the grinding wheel shaft 5 is securely held in its adjusted position by again tightening the clamping screw 12, any adjustment of the axis of the grinding wheel shaft 5 imparting a corresponding twist to the driving belt 26 which is slight for the ordinary adjustment of the grinding wheel shaft 5 as the axis of the sleeve 7 passes throughthe center of the driven pulley 27, The bearingportions of the spindle 14 are protected from dust b the sleeve 22 whichmoves with the spind e 14and incloses the hollow post 15 and the bearing surface of the worm 10 and worm gear wheel 9 are'likewise protected from dust by the top' plate 23 with lts downwardly projecting flange 24.

What I- claim as my invention and desire to secure by Letters Patent is 1. In a grinding machine, the combination with a framework and work hdlding means,

of a bearing for a spindle, a spindle vertically adjustable therein and havlng at its upper end an overhanging extension, a bearing supported by said overhanging extension, a sleeve rotatively adjustable in said bearing, means for adjusting said sleevefin its bearing, a journal bearing in said sleeve, and a grinding wheel shaft in said journal bearing.

2. In a grinding machine, the combination with a framework and work holding means, of a vertically adjustable spindle provided with an overhanging extension, a sleeve journaled vertically in said overhanging extension, a horizontal grinding wheel shaft supported by said sleeve, and means for Ithe 'axial adjustment of said sleeve in its bearing.

3. In a grinding machine, the combination of a vertically adjustable spindle provided with an overhanging extension, a sleeve journalelil in said overhanging extension, means for the axial adjustment of said sleeve in its bearing, a grinding wheel shaft supported by said sleeve., apulley carried by said shaft and inclosed within said sleeve.

al. In a grinding machine, the combination with a framework, of a hollow post support. ed on'said framework, a spind e adjustable in said post, a sleeve carriedby said spindle and overlapping said post., an overhanging extension on said spindle, and a grinding wheel shaft carried by said extension.

.5.' In a grinding machine, the combination with a framework, `of a bearing, a spindle slidable in said bearing, means for the vertical adjustment ol said spindle, an overhanging extension carried by said spindle, and having a bearing for a vertical sleeve, a vertical sleeve held in said bearing and having an opening in its upper end, means for the axial adjusnnent of said sleeve in its bearing,` a grinding wheel shaft supported. by said sleeve, a pulley held on said shaft and inclosed in said sleeve, and a belt connection for said pulley inclosed in said sleeve.

6. In a grinding machine, the combination el a bearing, a sleeve rotatively adjustable in said bearing, a grinding wheel shaft journaled in said sleeve, a driven pulley attached to said shaft and inclosed in said sleeve, and

means for axially adjusting said sleeve 1n its bearing.

7. In a grinding machine, the combination of a vertically adjustable spindle provided with an overhanging extension, a sleeve held in a vertical bearing in said overhanging ex-v tension, a worm gear attached to said sleeve, and a Worm journaled 1n saidroverhanging extension and in engagement with said Worm gear.

S. with aframework, of a pair of Work holding centers supported by said frame, a vertically adjustable s indle, an overhanging extension carried y said spindle, a vertical bearing .su ported by said extension, a sleeve rotative y adjustable in said bearing, a grinding wheel shaft journaled in said sleeve, and means for axially adjusting said sleeve to bring the axis of the grinding wheel shaft at an oblique angle to the axis of said work holding centers.

9. In a grinding machine, the combination with a hollow post, of a spindle adjustablein said hollow post, a dependingv extension from said spindle for sup orting a grinding wheel,

and a sleeve attac ed to said spindle and overlapping said hollow post, said sleeve are ranged to protect said spindle from dust from said grinding wheel.

SUBBO NIKOLOFF. Witnesses: ALBERT J. GIFFoED, GEORGE E. STEPHENS.

In a grinding machine, the combination 

